| SAXONICA | 
saxon:path() ==> xs:string
This function takes no arguments. It returns a string whose value is an XPath expression identifying
            the context node in the
            source tree. This can be useful for diagnostics, or to create an XPointer value, or when generating
            another stylesheet to process the same document. The resulting string can be used as input to the
            evaluate() function, provided that any namespace prefixes it uses are declared.